<!DOCTYPE html>
<html>

<head>
  <title>注册界面</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
    }

    form {
      width: 400px;
      margin: 0 auto;
      background-color: #fff;
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 0 15px rgba(0, 0, 0, 0.1), 0 8px 25px rgba(0, 0, 0, 0.3);
    }

    label {
      display: block;
      margin-bottom: 15px;
      font-weight: bold;
      color: #333;
    }

    input[type="text"],
    input[type="password"],
    input[type="email"] {
      width: 100%;
      padding: 15px;
      margin-bottom: 25px;
      border: 1px solid #ccc;
      border-radius: 5px;
      box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
      font-size: 16px;
    }

    input[type="submit"] {
      width: 100%;
      padding: 15px;
      background-color: #4CAF50;
      color: #fff;
      border: none;
      border-radius: 5px;
      cursor: pointer;
      font-size: 18px;
      box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
    }
  </style>
</head>

<body>
  <form action="">
    <label for="username">用户名：</label>
    <input type="text" id="username" name="username">

    <label for="email">邮箱：</label>
    <input type="email" id="email" name="email">

    <label for="password">密码：</label>
    <input type="password" id="password" name="password">

    <label for="confirm_password">确认密码：</label>
    <input type="password" id="confirm_password" name="confirm_password">

    <input type="submit" value="注册">
  </form>
</body>

</html>